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''Comet'' is a 1985 popular-science book by Carl Sagan and
Ann Druyan Ann Druyan ( ; born June 13, 1949) is an Emmy and Peabody Award-winning American documentary producer and director specializing in the communication of science. She co-wrote the 1980 PBS documentary series ''Cosmos'', hosted by Carl Sagan, ...
. The authors describe the scientific nature of
comets A comet is an icy, small Solar System body that, when passing close to the Sun, warms and begins to release gases, a process that is called outgassing. This produces a visible atmosphere or coma, and sometimes also a tail. These phenomena ar ...
, as well as their varying roles and perceptions throughout history. The evolution of human understanding of comets is also detailed, and thinkers and astronomers such as
Edmond Halley Edmond (or Edmund) Halley (; – ) was an English astronomer, mathematician and physicist. He was the second Astronomer Royal in Britain, succeeding John Flamsteed in 1720. From an observatory he constructed on Saint Helena in 1676–77, H ...
,
Immanuel Kant Immanuel Kant (, , ; 22 April 1724 – 12 February 1804) was a German philosopher and one of the central Enlightenment thinkers. Born in Königsberg, Kant's comprehensive and systematic works in epistemology, metaphysics, ethics, and ...
, and
William Huggins Sir William Huggins (7 February 1824 – 12 May 1910) was an English astronomer best known for his pioneering work in astronomical spectroscopy together with his wife, Margaret. Biography William Huggins was born at Cornhill, Middlesex, in ...
are discussed. The publication of the first edition was months ahead of the 1986 appearance of
Halley's Comet Halley's Comet or Comet Halley, officially designated 1P/Halley, is a short-period comet visible from Earth every 75–79 years. Halley is the only known short-period comet that is regularly visible to the naked eye from Earth, and thus the on ...
. A 1997 edition includes additional material.


References

1985 non-fiction books American non-fiction books English-language books Popular physics books Random House books Works by Carl Sagan Astronomy books Comets {{astronomy-book-stub